This subsection computes the RD function of three classical distributions, i.e.,
the binary source with Hamming distortion, the Gaussian source with squared-error distortion, and the Laplacian source with \(L_1\)  norm distortion.
The explicit expressions of the RD function in these cases can be found in [1]}, [2]} (see Section 4.3 and Section 10.3 respectively).
